C# 的 params

params 是类似于以前 C 中的 ... ，指的是不确定数量的参数。

params 可以用于函数或方法的 最后一个参数，代表后面是一串数量不定的参数。

params 等同于 new object[]，但用了 params时，就不用那么麻烦写 new object[] {}了。

如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace testParams
{
    class Program
    {
        void testParams(params object[] args)
        {
            foreach (string s in args)
            {
                Console.WriteLine("{0} is {1}", Array.IndexOf(args, s), s);
            }
        }

        void test2()
        {
            testParams(new object[] { "hahah are you ok?", "hahah this is me", "hahah pencilstart", "hahah a superme." });
        }

        void test1()
        {
            testParams("are you ok?", "this is me", "pencilstart", "a superme.");
        }

        static void Main(string[] args)
        {
            Program p = new Program();

            p.test1();

            Console.WriteLine("----");

            p.test2();
        }
    }


}

// 以下是运行结果======================

//0 is are you ok?
//1 is this is me
//2 is pencilstart
//3 is a superme.
//----
//0 is hahah are you ok?
//1 is hahah this is me
//2 is hahah pencilstart
//3 is hahah a superme.
//请按任意键继续. . .